Papers
Live trends in quantum computing research, updated daily from arXiv.
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Adversarial Learning Game for Intrusion Detection in Quantum Key Distribution
Noureldin Mohamed, Saif Al-Kuwari·Mar 3, 2026
While Quantum Key Distribution (QKD) provides information-theoretic security, the transition from theory to physical hardware introduces side-channel vulnerabilities that traditional error metrics often fail to characterize. This paper presents a hig...
Observation of Improved Accuracy over Classical Sparse Ground-State Solvers using a Quantum Computer
William Kirby, Bibek Pokharel, Javier Robledo Moreno +25 more·Mar 3, 2026
We experimentally demonstrate that a hybrid quantum-classical algorithm can outperform purely classical, off-the-shelf selected configuration interaction methods. First, we construct a class of local Hamiltonian problems with sparse ground states, an...
Spectral statistics and localization properties of a $C_3$-symmetric billiard
Matic Orel, Marko Robnik·Mar 3, 2026
We revisit the spectral statistics of the C$_3$--symmetric billiard introduced by Dembowski [Phys. Rev. E, R4516 (2000)], which exhibits both GOE and GUE statistics depending on the symmetry block. Using high--precision Beyn's contour--integral metho...
Mixed-state Phases from Higher-order SSPTs with Kramers-Wannier Symmetry
Aswin Parayil Mana, Zijian Song, Fei Yan +1 more·Mar 3, 2026
Mixed-state phases have recently attracted significant attention as a generalization beyond their pure-state counterparts. Prominent examples include mixed-state symmetry-protected topological (mSPT) phases and the strong-to-weak symmetry breaking (S...
Multi-Parameter Multi-Critical Metrology of the Dicke Model
Luca Previdi, Yilun Xu, Qiongyi He +1 more·Mar 3, 2026
Critical quantum metrology exploits the hypersensitivity of quantum systems near phase transitions to achieve enhanced precision in parameter estimation. While single-parameter estimation near critical points is well established, the simultaneous est...
Phase-space complexity of discrete-variable quantum states and operations
Siting Tang, Shunlong Luo, Matteo G. A. Paris·Mar 3, 2026
We introduce a quantifier of phase-space complexity for discrete-variable (DV) quantum systems. Motivated by a recent framework developed for continuous-variable systems, we construct a complexity measure of quantum states based on the Husimi Q-funct...
Bayesian post-correction of non-Markovian errors in bosonic lattice gravimetry
Bharath Hebbe Madhusudhana, Andrew Harter, Avadh Saxena·Mar 3, 2026
We study gravimetry with bosonic trapped atoms in the presence of random spatial inhomogeneity. The errors resulting from a random, shot-to-shot fluctuating spatial inhomogeneity are quantum non-Markovian. We show that in a system with $L>2$ modes (i...
Photonic hyperentanglement in polarisation and frequency via joint spectrum shaping
Tommaso Faleo, Fabian Steinhauser, Gregor Weihs +2 more·Mar 3, 2026
Hyperentanglement offers enhanced capacity for quantum information processing and communication protocols, especially in combination with robust high-dimensional degrees of freedom such as frequency-bin encoding. Here, we present a single-pass, unfil...
Quantum Theory of Functionally Graded Materials
Michael J. Landry, Ryotaro Okabe, Chuliang Fu +1 more·Mar 3, 2026
Functionally graded materials (FGMs) are composites whose composition or microstructure varies continuously in space, producing position-dependent mechanical and functional properties. In recent years, FGMs have gained significant attention due to ad...
Generalised All-Optical Cat Correction
Ari John Boon, Olivier Landon-Cardinal, Nicolás Quesada·Mar 3, 2026
We have generalised an all-optical telecorrection protocol for the higher orders of the cat code, and show that with these higher orders we can achieve target performance at substantially reduced iteration counts at the cost of a higher mean photon-n...
Anomalous Klein tunnelling with magnetic barriers in strained graphene
Edgardo Marin-Colli, Tonatiuh Gómez-Ramírez, O-Excell Gutierrez +3 more·Mar 3, 2026
We study electron transport in a strained graphene sheet subjected to a sequence of $N$ electrostatic and magnetic barriers. Employing a modified and improved transfer-matrix framework, we examine how the transmission and reflection coefficients evol...
Multiparty Quantum Key Agreement: Architectures, State-of-the-art, and Open Problems
Malik Mouaji, Saif Al-Kuwari·Mar 3, 2026
Multiparty quantum key agreement (MQKA) enables $n \geq 3$ mutually distrustful users to establish a shared secret key through collaborative quantum protocols. In this paper, we provide a comprehensive review where we argue that MQKA is best understo...
Recovery-Induced Erasure Attack on QKD Systems
Hashir Kuniyil, Asad Ali, Syed M. Arslan +3 more·Mar 3, 2026
Detector dead time is typically treated as a fixed parameter in quantum key distribution (QKD) security analyses. In practice, however, the effective recovery time of single-photon avalanche photodiodes (SPADs) depends on the incident count rate. In ...
Simultaneous anti-bunched and super-bunched photons from a GaAs Quantum dot in a dielectric metasurface
Sanghyeok Park, Oleg Mitrofanov, Kusal M. Abeywickrama +9 more·Mar 3, 2026
Semiconductor quantum dots host a rich manifold of excitonic complexes, including neutral excitons that emit anti-bunched single photons and charged exciton complexes capable of producing super-bunched photons via cascade emission. Accessing both emi...
Witnesses of non-Gaussian features as lower bounds of stellar rank
Jan Provazník, Šimon Bräuer, Vojtěch Kala +2 more·Mar 3, 2026
Quantum non-Gaussian states and operations serve as fundamental resources for universal quantum computation, error correction, and high-precision metrology, extending beyond the Gaussian limits. While the stellar rank provides a rigorous hierarchical...
Entanglement-Assisted Codes Outside the Stabilizer Framework
Jaszmine DeFranco, Andrew Nemec·Mar 3, 2026
We show how entanglement-assisted codes can be constructed from arbitrary quantum codes by associating them with quantum codes for erasure channels. If a subset of physical qubits is correctable for an erasure error, then it naturally forms the recei...
Achieving speedup in Dark Matter search experiments with a transmon-based NISQ algorithm
Roberto Moretti, Pietro Campana, Rodolfo Carobene +9 more·Mar 3, 2026
Coherent detection of ultralight bosonic dark matter can be achieved by monitoring slow Rabi oscillations in superconducting qubits. We introduce an ancilla-assisted, gate-based protocol that enhances sensitivity to the hidden photon kinetic mixing p...
Efficient Image Reconstruction Architecture for Neutral Atom Quantum Computing
Jonas Winklmann, Yian Yu, Xiaorang Guo +2 more·Mar 3, 2026
In recent years, neutral atom quantum computers (NAQCs) have attracted a lot of attention, primarily due to their long coherence times and good scalability. One of their main drawbacks is their comparatively time-consuming control overhead, with one ...
Quantum-Inspired Hamiltonian Feature Extraction for ADMET Prediction: A Simulation Study
B. Maurice Benson, Kendall Byler, Anna Petroff +2 more·Mar 3, 2026
Predicting absorption, distribution, metabolism, excretion, and toxicity (ADMET) properties remains a critical bottleneck in drug discovery. While molecular fingerprints effectively capture local structural features, they struggle to represent higher...
Tripartite information of free fermions: a universal entanglement coefficient from the sine kernel
Aleksandrs Sokolovs·Mar 3, 2026
We study the tripartite information I_3 of free fermions on two-dimensional lattices partitioned into three adjacent strips of width w. Translation invariance yields the exact decomposition I_3 = \sum_{k_y} g(k_F(k_y) w), where g(z) is a universal fu...